216 



Notes on Species of Corbiculadce. 



sequaliter declivi ; umbonibus prominentibus, violaceo-lividis, vel roseis, 

 Fig 43 violaceo subradiatis; valvis intus superne rubescentibus, 



ad margines violaceis ; cardine incrassato ; epidermide 

 fuscescente, nitente vestita ; striis regularibus, reraotis ; 

 lunula ovato-lanceolata. 



Long. 17; lat. 17; diam. 11 mill. 



C. triangularis. 



Hal.— ? 



Collect. Cuming et Prime. 



The shell is triangular, not much inflated, equilateral, and 

 solid. The beaks are prominent. The striae are regular, dis- 

 tant, and raised. The epidermis is of a darkish-brown color 

 and polished. The interior of the valves is of a pinkish-red 

 merging into violet towards the margins. The hinge is strong 

 and broad. The lunula is oval, but not distinct in color from 

 the rest of the shell. 



Comparing this species with Corb. Lydigiana, we find it to 

 be less inflated, more equilateral, more conical, and transversely 

 less broad, the beaks are also less inflated, and the color of the 

 interior of the valves is different. 



34. Corbicula crassula, Mousson. 



Corbicula (Cyrena) crassula, Mousson. 



Bellardi Cat. 54, f. 12. 1854. 

 Prime Cat. 3. 1863. 



C. testa trigona, inflata, cordiformi, subinaequilaterali ; latere antico 

 Fig. 44. rotundato, postico subobtuso ; valvis solidis, intus viola- 



ceis, ad margines saturatioribus ; umbonibus prominen- 

 tibus, incurvis, oppositis ; irregulariter et dense striata ; 

 epidermide fuscescente vestita; lunula ovata; cardine 

 incrassato. 



Long. 18 ; lat. 19 ; diam. 14 mill. 



Corb. crassula. 



Hah. — In lacu Horns, in flumine Orontes, Syriae, 

 et in flumine Tigris. Collect. Mousson, Wheatley et Prime. 



